diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2008-02-13 11:04:50 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-02-14 23:30:20 +0100 |
| commit | 69b1415e934fc1a796a817e32d84162ae65962f5 (patch) | |
| tree | c9a41dfe191131bcb4d9632d2f7541c3f5883474 /arch/x86/mm | |
| parent | 7bfeab9af95565e38a97fbcfb631e5b140241187 (diff) | |
x86: cpa: ensure page alignment
the cpa API is page aligned - warn about any weird alignments.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/pageattr.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index bd61ed13f9cf..5d2259468d3c 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -688,6 +688,15 @@ static int change_page_attr_set_clr(unsigned long addr, int numpages, if (!pgprot_val(mask_set) && !pgprot_val(mask_clr)) return 0; + /* Ensure we are PAGE_SIZE aligned */ + if (addr & ~PAGE_MASK) { + addr &= PAGE_MASK; + /* + * People should not be passing in unaligned addresses: + */ + WARN_ON_ONCE(1); + } + cpa.vaddr = addr; cpa.numpages = numpages; cpa.mask_set = mask_set; |